diff --git a/config/locales/server.en.yml b/config/locales/server.en.yml
index 0fa0f7694dc..e037414cd96 100644
--- a/config/locales/server.en.yml
+++ b/config/locales/server.en.yml
@@ -15,18 +15,6 @@
 # http://yamllint.com/
 
 en:
-  stringex:
-    characters:
-      ellipsis: ""
-      number: "-"
-  # some default transliteration rules may be missing, add them to your locale
-  i18n:
-    transliterate:
-      rule:
-        ț: "t"
-        Ț: "t"
-        ș: "s"
-        Ș: "s"
   dates:
     short_date_no_year: "D MMM"
     short_date: "D MMM, YYYY"
diff --git a/config/locales/transliterate.de.yml b/config/locales/transliterate.de.yml
new file mode 100644
index 00000000000..842ff6111db
--- /dev/null
+++ b/config/locales/transliterate.de.yml
@@ -0,0 +1,18 @@
+# encoding: utf-8
+#
+# This file contains transliteration rules for German
+#
+# To validate this YAML file after you change it, please paste it into
+# http://yamllint.com/
+
+de:
+  i18n:
+    transliterate:
+      rule:
+        Ä: "Ae"
+        Ö: "Oe"
+        Ü: "Ue"
+        ß: "ss"
+        ä: "ae"
+        ö: "oe"
+        ü: "ue"
diff --git a/config/locales/transliterate.en.yml b/config/locales/transliterate.en.yml
new file mode 100644
index 00000000000..28dd2e2e7cb
--- /dev/null
+++ b/config/locales/transliterate.en.yml
@@ -0,0 +1,20 @@
+# encoding: utf-8
+#
+# This file contains default transliteration rules and configures stringex
+#
+# To validate this YAML file after you change it, please paste it into
+# http://yamllint.com/
+
+en:
+  stringex:
+    characters:
+      ellipsis: ""
+      number: "-"
+  # some default transliteration rules may be missing, add them to your locale
+  i18n:
+    transliterate:
+      rule:
+        ț: "t"
+        Ț: "t"
+        ș: "s"
+        Ș: "s"
diff --git a/config/locales/transliterate.ru.yml b/config/locales/transliterate.ru.yml
index 25c4715b487..17a88b47fdd 100644
--- a/config/locales/transliterate.ru.yml
+++ b/config/locales/transliterate.ru.yml
@@ -2,9 +2,6 @@
 # This file contains content for the i18n transliteration map from
 # Russian Cyrillic to ASCII (ISO-9:1995 / GOST 7.79-2000, table B)
 #
-# To work with us on translations, see:
-# https://www.transifex.com/projects/p/discourse-pt-br/
-#
 # To validate this YAML file after you change it, please paste it into
 # http://yamllint.com/
 
diff --git a/config/locales/transliterate.vi.yml b/config/locales/transliterate.vi.yml
new file mode 100644
index 00000000000..7460eefa17b
--- /dev/null
+++ b/config/locales/transliterate.vi.yml
@@ -0,0 +1,148 @@
+# encoding: utf-8
+#
+# This file contains transliteration rules for Vietnamese
+#
+# To validate this YAML file after you change it, please paste it into
+# http://yamllint.com/
+
+vi:
+  i18n:
+    transliterate:
+      rule:
+        à: "a"
+        á: "a"
+        ạ: "a"
+        ả: "a"
+        ã: "a"
+        â: "a"
+        ầ: "a"
+        ấ: "a"
+        ậ: "a"
+        ẩ: "a"
+        ẫ: "a"
+        ă: "a"
+        ằ: "a"
+        ắ: "a"
+        ặ: "a"
+        ẳ: "a"
+        ẵ: "a"
+        è: "e"
+        é: "e"
+        ẹ: "e"
+        ẻ: "e"
+        ẽ: "e"
+        ê: "e"
+        ề: "e"
+        ế: "e"
+        ệ: "e"
+        ể: "e"
+        ễ: "e"
+        ì: "i"
+        í: "i"
+        ị: "i"
+        ỉ: "i"
+        ĩ: "i"
+        ò: "o"
+        ó: "o"
+        ọ: "o"
+        ỏ: "o"
+        õ: "o"
+        ô: "o"
+        ồ: "o"
+        ố: "o"
+        ộ: "o"
+        ổ: "o"
+        ỗ: "o"
+        ơ: "o"
+        ờ: "o"
+        ớ: "o"
+        ợ: "o"
+        ở: "o"
+        ỡ: "o"
+        ù: "u"
+        ú: "u"
+        ụ: "u"
+        ủ: "u"
+        ũ: "u"
+        ư: "u"
+        ừ: "u"
+        ứ: "u"
+        ự: "u"
+        ử: "u"
+        ữ: "u"
+        ỳ: "y"
+        ý: "y"
+        ỵ: "y"
+        ỷ: "y"
+        ỹ: "y"
+        đ: "d"
+        À: "A"
+        Á: "A"
+        Ạ: "A"
+        Ả: "A"
+        Ã: "A"
+        Â: "A"
+        Ầ: "A"
+        Ấ: "A"
+        Ậ: "A"
+        Ẩ: "A"
+        Ẫ: "A"
+        Ă: "A"
+        Ằ: "A"
+        Ắ: "A"
+        Ặ: "A"
+        Ẳ: "A"
+        Ẵ: "A"
+        È: "E"
+        É: "E"
+        Ẹ: "E"
+        Ẻ: "E"
+        Ẽ: "E"
+        Ê: "E"
+        Ề: "E"
+        Ế: "E"
+        Ệ: "E"
+        Ể: "E"
+        Ễ: "E"
+        Ì: "I"
+        Í: "I"
+        Ị: "I"
+        Ỉ: "I"
+        Ĩ: "I"
+        Ò: "O"
+        Ó: "O"
+        Ọ: "O"
+        Ỏ: "O"
+        Õ: "O"
+        Ô: "O"
+        Ồ: "O"
+        Ố: "O"
+        Ộ: "O"
+        Ổ: "O"
+        Ỗ: "O"
+        Ơ: "O"
+        Ờ: "O"
+        Ớ: "O"
+        Ợ: "O"
+        Ở: "O"
+        Ỡ: "O"
+        Ù: "U"
+        Ú: "U"
+        Ụ: "U"
+        Ủ: "U"
+        Ũ: "U"
+        Ư: "U"
+        Ừ: "U"
+        Ứ: "U"
+        Ự: "U"
+        Ử: "U"
+        Ữ: "U"
+        Ỳ: "Y"
+        Ý: "Y"
+        Ỵ: "Y"
+        Ỷ: "Y"
+        Ỹ: "Y"
+        Đ: "D"
+        ê: "e"
+        ù: "u"
+        à: "a"
diff --git a/lib/slug.rb b/lib/slug.rb
index 8d6ab1fa6f5..61520772352 100644
--- a/lib/slug.rb
+++ b/lib/slug.rb
@@ -4,8 +4,6 @@
 module Slug
 
   def self.for(string)
-    slug = string.gsub("'", "").parameterize
-    slug.gsub!("_", "-")
     # TODO review if ja should use this
     # ko asked for it to be removed
     if ['zh_CN', 'ja'].include?(SiteSetting.default_locale)
@@ -13,6 +11,9 @@ module Slug
         require 'stringex_lite'
       end
       slug = string.to_url
+    else
+      slug = string.gsub("'", "").parameterize
+      slug.gsub!("_", "-")
     end
     slug =~ /[^\d]/ ? slug : '' # Reject slugs that only contain numbers, because they would be indistinguishable from id's.
   end